Anyone know about how hard you have to hit your head before going into a coma?

In brief:
Unpredictable

There are too many variables involved in brain injury and trauma to determine a specific amount of force necessary to predictably cause a severe brain injury that would result in coma, without it causing death.

What ever prompted the question, don't do it.

In brief:
Unpredictable

There are too many variables involved in brain injury and trauma to determine a specific amount of force necessary to predictably cause a severe brain injury that would result in coma, without it causing death.

What ever prompted the question, don't do it.
Would you like to video or text chat with me?

In brief:
Depends

There is no hard and fast rule.

It depends on how much trauma or force is applied to the brain. There is no specific number or grading scale to measure how hard you have to be hit to cause enough damage to the brain to go into a coma.

In brief:
Depends

There is no hard and fast rule.

It depends on how much trauma or force is applied to the brain. There is no specific number or grading scale to measure how hard you have to be hit to cause enough damage to the brain to go into a coma.
Would you like to video or text chat with me?